Reverse flow multiple tool system and method

Abstract

A seat forming apparatus for use in a downhole tool comprising a driving member and a seating restriction. The driving member and the seating restriction are mechanically disposed within an outer housing of the downhole tool. When the driving member drives into the seating restriction, the seating restriction or the driving member bend or buckle inwards to form a seat in the downhole tool. The inner diameter of the seat is configured to allow a restriction element to be seated in the seat.

What is claimed is: 
     
       1. A multiple tool reverse flow system in a wellbore casing for use in a wellbore, said system comprising a plurality of catch-and-release tools and a catch-and-engage tool, wherein;
 said plurality of catch-and-release tools are configured to allow a restriction element to pass through in a downstream direction; 
 said catch-and-release tools are configured to engage and then allow said restriction element to pass through in an upstream direction; 
 said catch-and-engage tool is configured allow said restriction element to pass through only in a downstream direction; 
 said catch-and-engage tool is configured to engage and restrict ravel of said restriction element in an upstream direction; 
 said catch-and-engage tool is configured to form a seat on an upstream end of said catch-and-engage tool; and 
 said catch-and-engage tool is positioned upstream of all of said plurality of catch-and-release tools. 
 
     
     
       2. The multiple tool reverse flow system of  claim 1  further comprises a second multiple tool reverse flow system; said second multiple tool reverse flow system positioned immediately upstream of said multiple tool reverse flow system; wherein a second restriction element functions multiple tools in said second multiple tool reverse flow system and seats in said seat formed in said catch-and-engage tool of said multiple tool reverse flow system. 
     
     
       3. The multiple tool reverse flow system of  claim 2  wherein said multiple tool reverse flow system creates a first fracturing stage in a hydrocarbon formation; said first fracturing stage configured to be treated with fracturing fluids. 
     
     
       4. The multiple tool reverse flow system of  claim 3  wherein said second multiple tool reverse flow system creates a second fracturing stage in a hydrocarbon formation; said second fracturing stage configured to be treated with fracturing fluids. 
     
     
       5. The multiple tool reverse flow system of  claim 4  wherein when second restriction element seats in said seat said second restriction element isolates said first fracturing stage from said second fracturing stage during fracture treatment of said second fracturing stage. 
     
     
       6. The multiple tool reverse flow system of  claim 2  further comprises a plurality of multiple tool reverse flow systems; each of said plurality of multiple tool reverse flow systems configured to be actuated by one of a plurality of restriction elements. 
     
     
       7. The multiple tool reverse flow system of  claim 6  wherein each of said plurality of multiple tool reverse flow systems is configured to create a single distinct stage in a plurality of stages. 
     
     
       8. The multiple tool reverse flow system of  claim 6  wherein a number of said plurality of stages ranges from 1 to 100. 
     
     
       9. The multiple tool reverse flow system of  claim 1  wherein said catch-and-release tools do not form a seat on an upstream end of said plurality of catch-and-release tools. 
     
     
       10. The multiple tool reverse flow system of  claim 1  herein after each of said plurality of catch-and-release tools engage said restriction element, said restriction element actuates each of said plurality of catch-and-release tools in a reverse direction. 
     
     
       11. The multiple tool reverse flow system of  claim 1  wherein after each of said plurality of catch-and-release tools engage said restriction element, said restriction element arms and actuates each of said plurality of catch-and-release tools in a reverse direction. 
     
     
       12. The multiple tool reverse flow system of  claim 1  wherein after said catch-and-engage tool engages said restriction element, said restriction element actuates said catch-and-engage tool in a reverse direction. 
     
     
       13. The multiple tool reverse flow system of  claim 1  wherein after said catch-and-engage tool engages said restriction element, said restriction element actuates said catch-and-engage tool in a reverse direction. 
     
     
       14. The multiple tool reverse flow system of  claim 1  wherein a number of said plurality of catch-and-release tools range from 1 to 500. 
     
     
       15. The multiple tool reverse flow system of  claim 1  wherein an inner diameter of each of said plurality of catch-and-release tools and said catch-and-engage tool is substantially equal. 
     
     
       16. The multiple tool reverse flow system of  claim 1  wherein each of said plurality of catch-and-release tools and said catch-and-engage tool are configured with a tool inner diameter; and a ratio of a diameter of said restriction element to said tool inner diameter ranges from 0.5 to 0.99. 
     
     
       17. The multiple tool reverse flow system of  claim 1  wherein said a ratio of said tool inner diameter and a diameter of said wellbore casing ranges from 0.25 to 1.25. 
     
     
       18. The multiple tool reverse flow system of  claim 1  wherein each of said plurality of catch-and-release tools and said catch-and-engage tool are conveyed to predefined locations with a tubing in said wellbore. 
     
     
       19. The multiple tool reverse flow system of  claim 1  wherein each of said plurality of catch-and-release tools and said catch-and-engage tool are conveyed with said wellbore casing. 
     
     
       20. A reverse flow multiple tool functioning method, said method operating in conjunction with a reverse flow multiple tool system in a wellbore casing, said system comprising a plurality of catch-and-release tools and a catch-and-engage tool; wherein,
 said plurality of catch-and-release tools are configured to allow a restriction element to pass through in a downstream direction; 
 said catch-and-release tools are configured to engage and then allow said restriction element to pass through in an upstream direction; 
 said catch-and-engage tool is configured allow said restriction element to pass through only in a downstream direction; 
 said catch-and-engage tool is configured to engage and restrict travel of said restriction element in an upstream direction; 
 said catch-and-engage tool is configured to form a seat on an upstream end of said catch-and-engage tool; and 
 said catch-and-engage tool is positioned upstream of all of said plurality of catch-and-release tools; 
 wherein said method comprises the steps of: 
 (1) installing said well casing; 
 (2) deploying said restriction element into said well casing; 
 (3) allowing said restriction element to pass through said catch-and-engage tool and then through said plurality of catch-and-release tools in a downstream direction; 
 (4) flowing back said restriction element in a reverse direction; 
 (5) engaging said restriction element onto a first catch-and-release tool in said plurality of catch-and-release tools positioned at a downstream most end of said well casing; 
 (6) arming and exposing a first communication port in said first catch-and-release tool; 
 (7) releasing said restriction element in an upstream direction to engage onto a second catch-and-release tool in said plurality of catch-and-release tools positioned immediately upstream of said first catch-and-release tool; 
 (8) engaging said restriction element onto said second catch-and-release tool; 
 (9) arming and exposing a second communication port in a second catch-and-release tool; 
 (10) releasing said restriction element in an upstream direction; 
 (11) repeating said step (4) to step (10) until all of said plurality of catch-and-release tools are armed and exposed; 
 (12) releasing said restriction element in an upstream direction; 
 (13) engaging said restriction element onto said catch-and-engage tool; 
 (14) arming and exposing a communication port in said catch-and-engage tool; and 
 (15) forming a seat in an upstream end of said catch-and-engage tool.